[-/1 Points] DETAILS SERCP11 5.5.P.021. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A block of mass 3.80 kg is placed against a horizontal spring of constant k = 835 N/m and pushed so the spring compresses by 0.0400 m. HINT (a) What is the elastic potential energy of the block-spring system (in J)? (b) If the block is now released and the surface is frictionless, calculate the block's speed (in m/s) after leaving the spring. m/s Need Help? Read It Watch It